The somniloquy the speaking sleeping, is a form of parasomnia, a disorder due to which some will have strange behaviors during sleep. When we sink into sleep, both chemicals are released: glycine and GABA. They are responsible for a temporary paralysis that prevents any movement liable to wake up. That is why even when you dream that you are in the middle of a chase you do not sprint out of your bed.

In most people, these substances also prevent the vocal cords to function normally. Except that some people manage to free themselves and their voice still produces sounds and transcribes what is going on in their head at that time.

children is estimated that half regularly talk in their sleep. The percentage of adults is much lower. Only 5% regularly talk in their sleep according to the Journal Brain and Development. And people are also often somniloques sleepwalkers. However 71% of men and 75% of women have at least once in their life talked in their sleep. Men are also more “talkative” than women. But there is still no scientific explanation for this.


When he speaks, the sleeping is therefore between wakefulness and dreams. Apart from the inconvenience this may cause to your partner, it is not hazardous to health. Stress, alcohol or depression can encourage the phenomenon. A particularly moving TV program or a fascinating book just before falling asleep.

Note also that it is most often mumbles and that we remember that very rarely that we said in the morning. As stated Ginevra Uguccioni, neuropsychologist at Piety Salpêtrière in HuffingtonPost: “only 36% of nocturnal vocalizations are understandable words The remaining 74% consist of tears, laughter, cries and whispers.”. And when a person says something that we understand, this is rarely charming as it is mainly foul language and work as subject.